Question about 2002 Ford Explorer
Check connections - the wires for the lights that come on are different from the lights that don't.
you can check the trailer lights with a battery left/right/stop to see if they work independent of you vehicle.
you can check your vehicle connection with a meter or light probe.
you may need to check the trailering fuses and relays in the engine compartment. one or more may have failed.
Posted on Mar 25, 2011
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Posted on Jan 02, 2017
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Right Turn & Brake
Left Turn & Brake
Green- Right Turn and Brake
Yellow- Left Turn and Brake
Brown- Tail Lights
Red- Reverse (Back Up) Lights
Blue- Electric Brakes
Purple- Auxiliary Power
It sounds like your green and yello wires are shorted together somewhere along the length of the harness. I would check the wires on the trailer first. Easier yet, if you have another trailer to connec or access to another to use for testing, connect to it and see if the problem repeats; if it does the trouble is in the vehicle's wiring.
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